Interesting analysis of the language being used to explain the poisoning.
There are a couple of things jump out.
1)Experts claim it is not difficult to make just dangerous (just like TNT)
2)It is repeatedly stressed it is high purity.(AS an aside. Ore minerals contain a unique signature of impurities enabling their source to be determined with reasonable accuracy) To argue the same process can occur with the final product of an organic chemical synthesis that gives an extremely pure product is to stretch credulity. I would argue the lack of established provenance is the reason to stress high purity.
A red herring I would suggest.
3)Nowhere does the report mention novichok by name.
A deliberate omission. I think not.
4) Putting a security blanket over the full report does not do the government line any favours.
https://www.wsws.org/en/articles/2018/04/13/opcw-a13.html

O, what a tangled web we weave when first we practise to deceive!